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WorksheetsEnvironmental Chemistry Unit Review
Total questions: 25
Worksheet time: 25mins
Wearing gloves when handling mercury protects you from what mode of exposure?
absorption
inhalation
ingestion
leaching
Scientific studies have shown that the mercury content in the northern pike (a fish) is extremely high in some Alberta lakes. The pike is the last link in a food chain. Based on the information given, the scientific study most likely had to do with…
Biomagnification
Phytoremediation
Biodegradation
Dispersion
Which organism shown in the food chain above would contain the greatest concentration of chemical pollutants?
phytoplankton
krill
tuna
shark
Which beaker in the image has the highest turbidity?
A
B
C
D
Chemical reactions involving sunlight, air, car exhaust, and ozone cause which of the following to form?
primary pollutants
sick-building syndrome
smog
acid rain
The second step of ozone formation involves monatomic oxygen combining with what molecule?
CO2
O2
NO2
2H2O
Which of the following is a atmospheric nitrogen?
NO3-
NO2-
N2
NH3
Reactions that are initiated by the sun.
Photochemical reactions
Photochemical oxidants
Volatile organic compounds
Combustion
Sulfur Dioxide (SO2) and _______combine in the atmosphere to create acid rain or fog
Carbon dioxide (CO2)
Nitrogen Dioxide (NO2)
Ozone (O3)
Carbon monoxide (CO)
The main elements in CFCs are
Carbon, Calcium, Francium
Carbon, Chlorine, Fluorine
Chromium, Chlorine, Fluorine
Chlorine, Fluorine, Calcium
Which of these is a well known carcinogen often found in mine tailings?
Lead
Mercury
Asbestos
Arsenic
Below is a chart of test results from water samples taken at various sites. Which of the following best describes the results from these sites?
Site 1 is unhealthy because of its dissolved oxygen levels are too high.
Site 3 and 4 are unhealthy because the temperature is too low.
Site 2 is unhealthy because the pH is too high and the temperature is too low.
Site 5 is unhealthy because the temperature is too high and the dissolved oxygen is too low.
At which of the four locations would you most likely see evidence of an algae bloom?
Location 1
Location 2
Location 3
Location 4
Which human activities are the main causes of acid rain?
A and B only
B and D only
C and D only
A and D only
Based on the graphs, which of the below are true
The river became polluted only after 20km.
Pollution caused the number of bacteria to increase, hence reducing the oxygen level in the river.
The oxygen level in the river was returned to its original level at 50km AND Pollution caused the number of bacteria to increase, hence reducing the oxygen level in the river.
What are the pollutants known to cause acid rain?
nitrogen oxides and sulfur dioxide (sulfur compounds)
Low pH and Acid
Lemon Juice and Battery Acid
Particulate Matter and Carbon Dioxide
In the graph, the concentration of CFCs is reported in :
ppm (parts per million)
ppb (parts per billion
ppt (parts per trillion)
Years
Which year had the highest concentrations of CFCs in the atmosphere?
1990
1982
1998
1978
By what amount did carbon dioxide in Earth's atmosphere increase between 1960 and 2000?
40 -50 ppm
60 -70 ppm
110 -120 ppm
360 -370 ppm
Arrange the following chemicals from most to least toxic: dioxin, nicotine, botulinum toxin A, dieldren.
Dieldren, dioxin, nicotine, botulinum toxin A
Dieldren, nicotine, dioxin, botulinum toxin A
Botulinum toxin A, nicotine, dioxin, dieldren
Botulinum toxin A, dioxin, nicotine, dieldren
Scrubbers are devices installed in smokestacks to
reduce the amount of materials such as SO2 in the smoke they discharge
clean out the stack so smoke can move rapidly upwards
reduce the amount of sulphur in coal before it is burned
clean out the boilers for more efficient operation
Which of the following processes is primarily responsible for the breakdown of pollutants in the atmosphere?
Photolysis
Hydrolysis
Oxidation
Reduction
What is the main environmental concern associated with the use of chlorofluorocarbons (CFCs)?
Global warming
Ozone layer depletion
Acid rain
Water pollution
In an experiment to measure the acidity of rainwater, which of the following pH values would indicate the most acidic sample?
pH 7
pH 5
pH 3
pH 9
Which of the following is a common method for reducing nitrogen oxides (NOx) emissions from industrial sources?
Catalytic converters
Electrostatic precipitators
Scrubbers
Activated carbon filters
